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Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and landing strips (also misspelled as Marsden matting).
[citation needed] The term isogrid is used because the structure acts like an isotropic material, with equal properties measured in any direction, and grid, referring to the sheet and stiffeners structure. [citation needed] A similar variant is the orthogrid (sometimes called a waffle grid), which uses rectangular rather
A hollow structural section (HSS) is a type of metal profile with a hollow cross section. The term is used predominantly in the United States, or other countries which follow US construction or engineering terminology. HSS members can be circular, square, or rectangular sections, although other shapes such as elliptical are also available.
The primary grid types are "Standard 1" (15 ⁄ 16-inch face), Slimline (9 ⁄ 16-inch grid), and concealed grid. In the United States and its neighboring countries, the cell size in the suspension grids is typically either 2 by 2 feet (610 mm × 610 mm) or 2 by 4 feet (610 mm × 1,220 mm), and the ceiling tiles, light fixtures, and fluorescent ...
The Youngstown Sheet and Tube Company, based in Youngstown, Ohio, was an American steel manufacturer. Officially, the company was created on November 23, 1900, when Articles of Incorporation of the Youngstown Iron Sheet and Tube Company were filed with the Ohio Secretary of State at Columbus. In 1905 the word "Iron" was dropped from the company ...
The company filed for reorganization December 6, 2000 [4] and it emerged from Chapter 11 reorganization on October 2, 2006. [5] Its stock began trading on the New York Stock Exchange October 18, 2006. The Armstrong World Industries, Inc. Asbestos Personal Injury Settlement Trust in 2006 held approximately 66% of AWI's outstanding common shares. [6]
In most of the world, sheet metal thickness is consistently specified in millimeters. In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its gauge. The larger the gauge number, the thinner the metal. Commonly used steel sheet metal ranges from 30 gauge to about 7 gauge.
Quadtrees are a specialised form of grid in which the resolution of the grid is varied according to the nature and complexity of the data to be fitted, across the 2-d space. Polar grids utilize the polar coordinate system, using circles of a prescribed radius that are divided into sectors of a certain angle. Coordinates are given as the radius ...